![Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Blue, Small (US Version) : Sports & Outdoors Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Blue, Small (US Version) : Sports & Outdoors](https://m.media-amazon.com/images/I/41Et7Lr+EQL._AC_SY1000_.jpg)
Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Blue, Small (US Version) : Sports & Outdoors
![Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Teal, Large (US Version) : Sports & Outdoors Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Teal, Large (US Version) : Sports & Outdoors](https://m.media-amazon.com/images/I/41P95KkOkfL._AC_SY1000_.jpg)
Amazon.com: Fitbit Charge 2 Heart Rate + Fitness Wristband, Teal, Large (US Version) : Sports & Outdoors
![A few quick thoughts on Fitbit's new activity trackers, GPS watch (with optical heart rate!) | DC Rainmaker A few quick thoughts on Fitbit's new activity trackers, GPS watch (with optical heart rate!) | DC Rainmaker](https://media.dcrainmaker.com/images/2014/10/image_thumb45.png)
A few quick thoughts on Fitbit's new activity trackers, GPS watch (with optical heart rate!) | DC Rainmaker
![The Wall Street Journal on Twitter: The Wall Street Journal on Twitter:](https://pbs.twimg.com/media/CDvRy5gW0AAPToo.jpg)